- A Study on the Sintering Behavior of T42 High Speed Steel by Powder Injection Molding (PIM) Process
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Dong-Wook Park, Hye-Seong Kim, Young-Sam Kwon, Kwon-Koo Cho, Su-Gun Lim, In-Shup Ahn
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J Korean Powder Metall Inst. 2012;19(2):117-121.
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DOI: https://doi.org/10.4150/KPMI.2012.19.2.117
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- Tool steels serve a large range of applications including hot and cold workings of metals and injection mouldings of plastics or light alloys. The high speed steels (HSS) are specifically used as cutting tools and wear parts because it has high strength, wear resistance and hardness along with appreciable toughness and fatigue resistance. From the view of HSS microstructure, it can be described as metallic matrix composites formed by a ferrous with a dispersion of hard and wear resistant carbides. The experimental specimens were manufactured using the PIM with T42 powders (50~80 vol.%) and polymer (20~50 vol.%). The green parts were debinded in n-hexane solution at 60°C for 8 hours and thermal debinded at an N_2-H_2 mixed gas atmosphere for 8 hours. Specimens were sintered in high vacuum (10-5 Torr) and various temperatures.
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Citations
Citations to this article as recorded by  - Effects Of Process Parameters On Cu Powder Synthesis Yield And Particle Size In A Wet-Chemical Process
Y.M. Shin, J.-H. Lee
Archives of Metallurgy and Materials.2015; 60(2): 1247. CrossRef
- The Characteristic Changes of Sintered WC-10Co Fabricated by PIM Method with Different Carbon Content
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Sang-Dae Kang, Dong-Wook Park, Young-Sam Kwon, Kwon-Koo Cho, In-Shup Ahn
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J Korean Powder Metall Inst. 2011;18(3):262-268.
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DOI: https://doi.org/10.4150/KPMI.2011.18.3.262
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- In order to investigate the microstructure and mechanical properties of WC-10 wt% Co insert tool alloy fabricated by PIM (Powder Injection Molding) process, the feedstock of WC-10 wt% and wax used as a kind of binder were mixed together by two blade mixer. After injection molding, the debinding process was carried out by two-steps. First, solvent extraction, in which the binder was eliminated by putting the specimen into normal hexane for 24 hrs at 60°C, and subsequently thermal debinding which was conducted at 260°C and 480°C for 6 hrs in the mixed gas of H_2/N_2, respectively. Meantime, in order to compensate the decarburization due to hydrogen, 1.2~1.8% of carbon was added to ensure the integrity of the phase. Finally, the specimens were sintered in vacuum under different temperatures, and the relative density of 99.8% and hardness of 2100 Hv can be achieved when sintered at 1380°C, even the TRS is lower than the conventional sintering process.
- Spark Plasma Sintering Behavior of Binderless WC Powders
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Hwan-Tae Kim, Dong-Wook Park, Ji-Soon Kim, Young-Soon Kwon, Hye-Suk Kwon, Eung-Ryul Baek
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J Korean Powder Metall Inst. 2003;10(3):176-180.
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DOI: https://doi.org/10.4150/KPMI.2003.10.3.176
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- Pure WC powders which does not include a binder phase were consolidated by spark plasma sintering (SPS) process at 1600~1850°C for 0~30 min under 50 MPa. Microstructure alid mechanical properties of binderless WC prepared by SPS were investigated. With increasing sintering temperature, sintered density and Vickers hardness of binderless WC increased. The fracture toughness of binderless WC was 7~15 MPa m1/2 depending on the sintered density and decreased with increasing the Vickers hardness. It is found that the binderless WC prepared by SPS at 1750°C for 10 min under 50 MPa showed nearly full densification with fine-grained structure and revealed excellent mechanical properties of high hardness (~HV 2400) and considerably high fracture toughness (~7 MPa m1/2).
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Citations
Citations to this article as recorded by - Improvement of Surface Properties of Inconel718 by HVOF Coating with WC-Metal Powder and by Laser Heat Treatment of the Coating
Hui Gon Chun, Tong Yul Cho, Jae Hong Yoon, Gun Hwan Lee
Advances in Materials Science and Engineering.2015; 2015: 1. CrossRef - Improving the Properties of Magnetic Bearing Shaft Material by HVOF Coating of WC-Metal Powder and Laser Heat Treatment
T.Y. Cho, Y.K. Joo, J. H. Yoon, H. G. Chun, S.H. Zhang
Advanced Materials Research.2012; 560-561: 1052. CrossRef - Surface Modification by HVOF Coating of Micron-Sized WC-Metal Powder and Laser-Heating of the Coating
Tong Yul Cho, Jae Hong Yoon, Sung Kang Hur, Hui Gon Chun, Shi Hong Zhang
Materials Science Forum.2011; 686: 654. CrossRef - Surface properties and tensile bond strength of HVOF thermal spray coatings of WC-Co powder onto the surface of 420J2 steel and the bond coats of Ni, NiCr, and Ni/NiCr
Tong Yul Cho, Jae Hong Yoon, Jae Young Cho, Yun Kon Joo, Jin Ho Kang, Shihong Zhang, Hui Gon Chun, Soon Young Hwang, Sik Chol Kwon
Surface and Coatings Technology.2009; 203(20-21): 3250. CrossRef - Rapid sintering process and mechanical properties of binderless ultra fine tungsten carbide
Hwan-Cheol Kim, Jin-Kook Yoon, Jung-Mann Doh, In-Yong Ko, In-Jin Shon
Materials Science and Engineering: A.2006; 435-436: 717. CrossRef - Consolidation and properties of binderless sub-micron tungsten carbide by field-activated sintering
Hwan-Cheol Kim, In-Jin Shon, J.E. Garay, Z.A. Munir
International Journal of Refractory Metals and Hard Materials.2004; 22(6): 257. CrossRef
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